The English term Jew is originally derived from the Hebrew term Yehudi (lit.'of Judah'), which passed into Greek as Ioudaios and into Latin as Iudaeus, in turn evolving into the Old French term giu after the letter "d" was dropped.[1] A variety of related forms are found in early English from about the year 1000, including Iudea, Gyu, Giu, Iuu, Iuw, and Iew, which eventually developed into the modern English word for the Jewish people.
^Cf. Marcus Jastrow's Dictionary of the Targumim, Talmud Babli, Talmud Yerushalmi and Midrashic Literature, and the source he used: Megilla 13a:2 (Talmud).